A:AnswerMy guess would be "no" as it has no internal memory and cannot support a memory card.
However--if there's a storage device (like a USB-memory stick) that uses a USB-B plug/port, then maybe you could do 'stand-alone' scanning.
Now, if it were connected (wirelessly) to a LAN, perhaps it could scan to another device (which likely must be powered ON) but that seems outside your criteria of not requiring any other devices.
A:AnswerAlthough browser based operating systems are not supported, the PIXMA MG3620 does support Google Cloud Print, allowing users to print from Gmail, Google Docs and other applications that are Cloud Print ready.
A:AnswerRead the handbook or go to http://ugp01.c-ij.com/ij/webmanual/WebPortal/PTL/ptl-os.html?lng=en&type=setup&area=us&mdl=MG3620
You'll find it pretty straight forward.
A:AnswerI'm not sure I understand your question. You should be able to print from your computer. If you are not able, try going to the Canon website for troubleshooting, or try reinstalling the drivers.